Fix some tests.
Fix some tests.

Geoion/Tornado-MySQL,NunoEdgarGub1/PyMySQL,modulexcite/PyMySQL,jheld/PyMySQL,yeyinzhu3211/PyMySQL,MartinThoma/PyMySQL,eibanez/PyMySQL,PyMySQL/PyMySQL,eibanez/PyMySQL,DashaChuk/PyMySQL,Ting-y/PyMySQL,mosquito/Tornado-MySQL,aio-libs/aiomysql,wraziens/PyMySQL,PyMySQL/Tornado-MySQL,yeyinzhu3211/PyMySQL,xjzhou/PyMySQL,methane/PyMySQL,anson-tang/PyMySQL,pymysql/pymysql,jwjohns/PyMySQL,lzedl/PyMySQL,nju520/PyMySQL,pulsar314/Tornado-MySQL,lzedl/PyMySQL,xjzhou/PyMySQL,boneyao/PyMySQL,wraziens/PyMySQL